These are the stemless wine glasses that keep wine chilled between 32° F and 36° F for 30 minutes. The double-walled glasses have a vicous cooling liquid between both layers that freezes after one hour in a freezer, enabling the glasses to chill a room-temperature libation to 36° F in just 2 1/2 minutes. The glasses are made from durable, borosilicate glass that withstands temperature extremes of -22° F to 482° F, and their double-walled construction prevents hands from getting too cold. They each hold 4 3/4 ounces and their tall, slender shape keeps aroma at the topmost part of the wine glass. Dishwasher safe. Set of Four. Each: 4 3/4" H x 2 1/2" Diam. (8 oz.)